Messages in this thread | | | Date | Wed, 9 May 2012 22:12:19 +0200 | From | Oleg Nesterov <> | Subject | Re: ptrace.2: PTRACE_KILL needs a stopped process too |
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On 05/09, Pedro Alves wrote: > > On 05/09/2012 04:09 PM, Mike Frysinger wrote: > > > probably not that big of a deal, but the reason i like using > > ptrace(PTRACE_KILL) over a raw kill() is that you are less likely to kill the > > wrong process by accident. maybe not that big of a deal in practice though. > > > And you can do tgkill instead. It was specifically invented to handle the > reuse case.
tgkill() can kill the wrong process/thread too, although it lessens the risk.
But I don't really understand the problem. The traced thread can't go away until the tracer does wait/detach, and thus its pid can't be reused?
May be, "by accident" above means something else, not pid reuse...
Oleg.
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